Dissections of the lower leg, knee joint and foot, back view: three figures, with the arteries and blood vessels indicated… https://www.rawpixel.com/image/13989554/image-person-art-public-domainFree Image from public domain licenseDissected left knee joint of a patient with osteo-arthritis and locomotor ataxia https://www.rawpixel.com/image/13982450/image-person-art-black-backgroundFree Image from public domain license